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The HELI-CAL® “Flexure” is an advanced and unique u-joint solution that generally exceeds the capabilities of common u-joint designs. A HELI-CAL® u-joint is really a flexure capable of over 5°of angular misalignment. It may accommodate up to 90° of angular misalignment in certain circumstances. This type of u-joint will also compensate for axial and parallel misalignment.